mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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77 lines
2.0 KiB
HTML
77 lines
2.0 KiB
HTML
<!--
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Copyright (c) 2009 The Chromium Authors. All rights reserved.
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Use of this source code is governed by a BSD-style license that can be
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found in the LICENSE file.
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-->
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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"http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>WebGL Scissor Test</title>
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<link rel="stylesheet" href="../resources/js-test-style.css"/>
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<script src="../resources/desktop-gl-constants.js" type="text/javascript"></script>
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<script src="../../debug/webgl-debug.js"></script>
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<script src="../resources/js-test-pre.js"></script>
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<script src="resources/webgl-test-utils.js"></script>
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</head>
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<body>
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<div id="description"></div>
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<div id="console"></div>
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<canvas id="canvas" width="2" height="2" style="width: 40px; height: 40px;"> </canvas>
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<script>
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description("Check if glScissor setting works.");
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debug("");
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debug("Canvas.getContext");
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var wtu = WebGLTestUtils;
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var gl = wtu.create3DContext(document.getElementById("canvas"));
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if (!gl) {
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testFailed("context does not exist");
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} else {
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testPassed("context exists");
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debug("");
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gl.clearColor(0,0,0,0);
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gl.clear(gl.COLOR_BUFFER_BIT);
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// clear a portion of our FBO
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gl.enable(gl.SCISSOR_TEST);
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gl.scissor(0, 0, 1, 1);
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gl.clearColor(0,1,0,1);
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gl.clear(gl.COLOR_BUFFER_BIT);
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var b = new Uint8Array(2 * 2 * 4);
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gl.readPixels(0, 0, 2, 2, gl.RGBA, gl.UNSIGNED_BYTE, b);
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checkPixel(b, 0, 0, [0, 1, 0, 1]);
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checkPixel(b, 1, 0, [0, 0, 0, 0]);
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checkPixel(b, 0, 1, [0, 0, 0, 0]);
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checkPixel(b, 1, 1, [0, 0, 0, 0]);
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function checkPixel(b, x, y, color) {
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var offset = (y * 2 + x) * 4;
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var match = true;
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for (var c = 0; c < 4; ++c) {
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if (b[offset + c] != color[c] * 255) {
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match = false;
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break;
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}
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}
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assertMsg(match, "pixel at " + x + ", " + y + " is expected value");
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}
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}
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debug("");
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successfullyParsed = true;
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</script>
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<script src="../resources/js-test-post.js"></script>
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<script>
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</script>
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</body>
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</html>
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